<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>outline-offset</title>
<style type="text/css">
div { width: 100px; margin: 100px; padding: 10px; border: 3px solid #333;
	outline: 1px solid #0f0;
	outline-offset: 10px;
}
</style>
</head>
<body>
<div>注意边框线外面的绿色轮廓</div>
</body>
</html>
